[mirror_edk2.git] / UefiCpuPkg / Include / Library / MtrrLib.h

/** @file\r
  MTRR setting library\r
\r
  Copyright (c) 2008 - 2017, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef  _MTRR_LIB_H_\r
#define  _MTRR_LIB_H_\r
\r
//\r
// According to IA32 SDM, MTRRs number and MSR offset are always consistent\r
// for IA32 processor family\r
//\r
\r
//\r
// The semantics of below macro is MAX_MTRR_NUMBER_OF_VARIABLE_MTRR, the real number can be read out from MTRR_CAP register.\r
//\r
#define  MTRR_NUMBER_OF_VARIABLE_MTRR  32\r
//\r
// Firmware need reserve 2 MTRR for OS\r
// Note: It is replaced by PCD PcdCpuNumberOfReservedVariableMtrrs\r
//\r
#define  RESERVED_FIRMWARE_VARIABLE_MTRR_NUMBER  2\r
\r
#define  MTRR_NUMBER_OF_FIXED_MTRR      11\r
//\r
// Below macro is deprecated, and should not be used.\r
//\r
#define  FIRMWARE_VARIABLE_MTRR_NUMBER  6\r
#define  MTRR_LIB_IA32_MTRR_CAP                      0x0FE\r
#define  MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK            0x0FF\r
#define  MTRR_LIB_IA32_MTRR_FIX64K_00000             0x250\r
#define  MTRR_LIB_IA32_MTRR_FIX16K_80000             0x258\r
#define  MTRR_LIB_IA32_MTRR_FIX16K_A0000             0x259\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_C0000              0x268\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_C8000              0x269\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_D0000              0x26A\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_D8000              0x26B\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_E0000              0x26C\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_E8000              0x26D\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_F0000              0x26E\r
#define  MTRR_LIB_IA32_MTRR_FIX4K_F8000              0x26F\r
#define  MTRR_LIB_IA32_VARIABLE_MTRR_BASE            0x200\r
//\r
// Below macro is deprecated, and should not be used.\r
//\r
#define  MTRR_LIB_IA32_VARIABLE_MTRR_END             0x20F\r
#define  MTRR_LIB_IA32_MTRR_DEF_TYPE                 0x2FF\r
#define  MTRR_LIB_MSR_VALID_MASK                     0xFFFFFFFFFULL\r
#define  MTRR_LIB_CACHE_VALID_ADDRESS                0xFFFFFF000ULL\r
#define  MTRR_LIB_CACHE_MTRR_ENABLED                 0x800\r
#define  MTRR_LIB_CACHE_FIXED_MTRR_ENABLED           0x400\r
\r
//\r
// Structure to describe a fixed MTRR\r
//\r
typedef struct {\r
  UINT32  Msr;\r
  UINT32  BaseAddress;\r
  UINT32  Length;\r
} FIXED_MTRR;\r
\r
//\r
// Structure to describe a variable MTRR\r
//\r
typedef struct {\r
  UINT64  BaseAddress;\r
  UINT64  Length;\r
  UINT64  Type;\r
  UINT32  Msr;\r
  BOOLEAN Valid;\r
  BOOLEAN Used;\r
} VARIABLE_MTRR;\r
\r
//\r
// Structure to hold base and mask pair for variable MTRR register\r
//\r
typedef struct _MTRR_VARIABLE_SETTING_ {\r
  UINT64    Base;\r
  UINT64    Mask;\r
} MTRR_VARIABLE_SETTING;\r
\r
//\r
// Array for variable MTRRs\r
//\r
typedef struct _MTRR_VARIABLE_SETTINGS_ {\r
  MTRR_VARIABLE_SETTING   Mtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];\r
} MTRR_VARIABLE_SETTINGS;\r
\r
//\r
// Array for fixed MTRRs\r
//\r
typedef  struct  _MTRR_FIXED_SETTINGS_ {\r
  UINT64       Mtrr[MTRR_NUMBER_OF_FIXED_MTRR];\r
} MTRR_FIXED_SETTINGS;\r
\r
//\r
// Structure to hold all MTRRs\r
//\r
typedef struct _MTRR_SETTINGS_ {\r
  MTRR_FIXED_SETTINGS       Fixed;\r
  MTRR_VARIABLE_SETTINGS    Variables;\r
  UINT64                    MtrrDefType;\r
} MTRR_SETTINGS;\r
\r
//\r
// Memory cache types\r
//\r
typedef enum {\r
  CacheUncacheable    = 0,\r
  CacheWriteCombining = 1,\r
  CacheWriteThrough   = 4,\r
  CacheWriteProtected = 5,\r
  CacheWriteBack      = 6,\r
  CacheInvalid        = 7\r
} MTRR_MEMORY_CACHE_TYPE;\r
\r
#define  MTRR_CACHE_UNCACHEABLE      0\r
#define  MTRR_CACHE_WRITE_COMBINING  1\r
#define  MTRR_CACHE_WRITE_THROUGH    4\r
#define  MTRR_CACHE_WRITE_PROTECTED  5\r
#define  MTRR_CACHE_WRITE_BACK       6\r
#define  MTRR_CACHE_INVALID_TYPE     7\r
\r
/**\r
  Returns the variable MTRR count for the CPU.\r
\r
  @return Variable MTRR count\r
\r
**/\r
UINT32\r
EFIAPI\r
GetVariableMtrrCount (\r
  VOID\r
  );\r
\r
/**\r
  Returns the firmware usable variable MTRR count for the CPU.\r
\r
  @return Firmware usable variable MTRR count\r
\r
**/\r
UINT32\r
EFIAPI\r
GetFirmwareVariableMtrrCount (\r
  VOID\r
  );\r
\r
/**\r
  This function attempts to set the attributes for a memory range.\r
\r
  @param[in]       BaseAddress       The physical address that is the start\r
                                     address of a memory region.\r
  @param[in]       Length            The size in bytes of the memory region.\r
  @param[in]       Attribute         The bit mask of attributes to set for the\r
                                     memory region.\r
\r
  @retval RETURN_SUCCESS            The attributes were set for the memory\r
                                    region.\r
  @retval RETURN_INVALID_PARAMETER  Length is zero.\r
  @retval RETURN_UNSUPPORTED        The processor does not support one or\r
                                    more bytes of the memory resource range\r
                                    specified by BaseAddress and Length.\r
  @retval RETURN_UNSUPPORTED        The bit mask of attributes is not support\r
                                    for the memory resource range specified\r
                                    by BaseAddress and Length.\r
  @retval RETURN_ACCESS_DENIED      The attributes for the memory resource\r
                                    range specified by BaseAddress and Length\r
                                    cannot be modified.\r
  @retval RETURN_OUT_OF_RESOURCES   There are not enough system resources to\r
                                    modify the attributes of the memory\r
                                    resource range.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
MtrrSetMemoryAttribute (\r
  IN PHYSICAL_ADDRESS        BaseAddress,\r
  IN UINT64                  Length,\r
  IN MTRR_MEMORY_CACHE_TYPE  Attribute\r
  );\r
\r
\r
/**\r
  This function will get the memory cache type of the specific address.\r
  This function is mainly for debugging purposes.\r
\r
  @param[in]  Address            The specific address\r
\r
  @return The memory cache type of the specific address\r
\r
**/\r
MTRR_MEMORY_CACHE_TYPE\r
EFIAPI\r
MtrrGetMemoryAttribute (\r
  IN PHYSICAL_ADDRESS   Address\r
  );\r
\r
\r
/**\r
  This function will get the raw value in variable MTRRs\r
\r
  @param[out]  VariableSettings   A buffer to hold variable MTRRs content.\r
\r
  @return The buffer point to MTRR_VARIABLE_SETTINGS in which holds the content of the variable MTRR\r
\r
**/\r
MTRR_VARIABLE_SETTINGS*\r
EFIAPI\r
MtrrGetVariableMtrr (\r
  OUT MTRR_VARIABLE_SETTINGS         *VariableSettings\r
  );\r
\r
\r
/**\r
  This function sets variable MTRRs\r
\r
  @param[in]  VariableSettings   A buffer to hold variable MTRRs content.\r
\r
  @return The pointer of VariableSettings\r
\r
**/\r
MTRR_VARIABLE_SETTINGS*\r
EFIAPI\r
MtrrSetVariableMtrr (\r
  IN MTRR_VARIABLE_SETTINGS         *VariableSettings\r
  );\r
\r
\r
/**\r
  This function gets the content in fixed MTRRs\r
\r
  @param[out]  FixedSettings      A buffer to hold fixed MTRRs content.\r
\r
  @return The pointer of FixedSettings\r
\r
**/\r
MTRR_FIXED_SETTINGS*\r
EFIAPI\r
MtrrGetFixedMtrr (\r
  OUT MTRR_FIXED_SETTINGS         *FixedSettings\r
  );\r
\r
\r
/**\r
  This function sets fixed MTRRs\r
\r
  @param[in]   FixedSettings      A buffer holding fixed MTRRs content.\r
\r
  @return  The pointer of FixedSettings\r
\r
**/\r
MTRR_FIXED_SETTINGS*\r
EFIAPI\r
MtrrSetFixedMtrr (\r
  IN MTRR_FIXED_SETTINGS          *FixedSettings\r
  );\r
\r
\r
/**\r
  This function gets the content in all MTRRs (variable and fixed)\r
\r
  @param[out]  MtrrSetting   A buffer to hold all MTRRs content.\r
\r
  @return The pointer of MtrrSetting\r
\r
**/\r
MTRR_SETTINGS *\r
EFIAPI\r
MtrrGetAllMtrrs (\r
  OUT MTRR_SETTINGS                *MtrrSetting\r
  );\r
\r
\r
/**\r
  This function sets all MTRRs (variable and fixed)\r
\r
  @param[in]  MtrrSetting   A buffer to hold all MTRRs content.\r
\r
  @return The pointer of MtrrSetting\r
\r
**/\r
MTRR_SETTINGS *\r
EFIAPI\r
MtrrSetAllMtrrs (\r
  IN MTRR_SETTINGS                *MtrrSetting\r
  );\r
\r
\r
/**\r
  Get the attribute of variable MTRRs.\r
\r
  This function shadows the content of variable MTRRs into\r
  an internal array: VariableMtrr\r
\r
  @param[in]   MtrrValidBitsMask    The mask for the valid bit of the MTRR\r
  @param[in]   MtrrValidAddressMask The valid address mask for MTRR since the base address in\r
                                    MTRR must align to 4K, so valid address mask equal to\r
                                    MtrrValidBitsMask & 0xfffffffffffff000ULL\r
  @param[out]  VariableMtrr         The array to shadow variable MTRRs content\r
\r
  @return                       The return value of this parameter indicates the number of\r
                                MTRRs which has been used.\r
**/\r
UINT32\r
EFIAPI\r
MtrrGetMemoryAttributeInVariableMtrr (\r
  IN  UINT64                    MtrrValidBitsMask,\r
  IN  UINT64                    MtrrValidAddressMask,\r
  OUT VARIABLE_MTRR             *VariableMtrr\r
  );\r
\r
\r
/**\r
  This function prints all MTRRs for debugging.\r
**/\r
VOID\r
EFIAPI\r
MtrrDebugPrintAllMtrrs (\r
  VOID\r
  );\r
\r
/**\r
  Checks if MTRR is supported.\r
\r
  @retval TRUE  MTRR is supported.\r
  @retval FALSE MTRR is not supported.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
IsMtrrSupported (\r
  VOID\r
  );\r
\r
/**\r
  Returns the default MTRR cache type for the system.\r
\r
  @return  The default MTRR cache type.\r
\r
**/\r
MTRR_MEMORY_CACHE_TYPE\r
EFIAPI\r
MtrrGetDefaultMemoryType (\r
  VOID\r
  );\r
\r
/**\r
  This function attempts to set the attributes into MTRR setting buffer for a memory range.\r
\r
  @param[in, out]  MtrrSetting  MTRR setting buffer to be set.\r
  @param[in]       BaseAddress  The physical address that is the start address\r
                                of a memory region.\r
  @param[in]       Length       The size in bytes of the memory region.\r
  @param[in]       Attribute    The bit mask of attributes to set for the\r
                                memory region.\r
\r
  @retval RETURN_SUCCESS            The attributes were set for the memory region.\r
  @retval RETURN_INVALID_PARAMETER  Length is zero.\r
  @retval RETURN_UNSUPPORTED        The processor does not support one or more bytes of the\r
                                    memory resource range specified by BaseAddress and Length.\r
  @retval RETURN_UNSUPPORTED        The bit mask of attributes is not support for the memory resource\r
                                    range specified by BaseAddress and Length.\r
  @retval RETURN_ACCESS_DENIED      The attributes for the memory resource range specified by\r
                                    BaseAddress and Length cannot be modified.\r
  @retval RETURN_OUT_OF_RESOURCES   There are not enough system resources to modify the attributes of\r
                                    the memory resource range.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
MtrrSetMemoryAttributeInMtrrSettings (\r
  IN OUT MTRR_SETTINGS       *MtrrSetting,\r
  IN PHYSICAL_ADDRESS        BaseAddress,\r
  IN UINT64                  Length,\r
  IN MTRR_MEMORY_CACHE_TYPE  Attribute\r
  );\r
\r
#endif // _MTRR_LIB_H_\r
Commit	Line	Data
e50466da	1	/** @file\r
	2	MTRR setting library\r
	3	\r
341fea64	4	Copyright (c) 2008 - 2017, Intel Corporation. All rights reserved.<BR>\r
01a1c0fc	5	This program and the accompanying materials\r
e50466da	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
	15	#ifndef _MTRR_LIB_H_\r
	16	#define _MTRR_LIB_H_\r
	17	\r
	18	//\r
341fea64	19	// According to IA32 SDM, MTRRs number and MSR offset are always consistent\r
e50466da	20	// for IA32 processor family\r
e50466da	21	//\r
3b9be416 JY	22	\r
3b9be416 JY	23	//\r
3ba736f3	24	// The semantics of below macro is MAX_MTRR_NUMBER_OF_VARIABLE_MTRR, the real number can be read out from MTRR_CAP register.\r
3b9be416	25	//\r
3ba736f3	26	#define MTRR_NUMBER_OF_VARIABLE_MTRR 32\r
3b9be416 JY	27	//\r
3b9be416 JY	28	// Firmware need reserve 2 MTRR for OS\r
46309b11	29	// Note: It is replaced by PCD PcdCpuNumberOfReservedVariableMtrrs\r
3b9be416 JY	30	//\r
	31	#define RESERVED_FIRMWARE_VARIABLE_MTRR_NUMBER 2\r
	32	\r
e50466da	33	#define MTRR_NUMBER_OF_FIXED_MTRR 11\r
3ba736f3 JY	34	//\r
	35	// Below macro is deprecated, and should not be used.\r
	36	//\r
	37	#define FIRMWARE_VARIABLE_MTRR_NUMBER 6\r
3b9be416 JY	38	#define MTRR_LIB_IA32_MTRR_CAP 0x0FE\r
3b9be416 JY	39	#define MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK 0x0FF\r
e50466da	40	#define MTRR_LIB_IA32_MTRR_FIX64K_00000 0x250\r
	41	#define MTRR_LIB_IA32_MTRR_FIX16K_80000 0x258\r
	42	#define MTRR_LIB_IA32_MTRR_FIX16K_A0000 0x259\r
	43	#define MTRR_LIB_IA32_MTRR_FIX4K_C0000 0x268\r
	44	#define MTRR_LIB_IA32_MTRR_FIX4K_C8000 0x269\r
	45	#define MTRR_LIB_IA32_MTRR_FIX4K_D0000 0x26A\r
	46	#define MTRR_LIB_IA32_MTRR_FIX4K_D8000 0x26B\r
	47	#define MTRR_LIB_IA32_MTRR_FIX4K_E0000 0x26C\r
	48	#define MTRR_LIB_IA32_MTRR_FIX4K_E8000 0x26D\r
	49	#define MTRR_LIB_IA32_MTRR_FIX4K_F0000 0x26E\r
	50	#define MTRR_LIB_IA32_MTRR_FIX4K_F8000 0x26F\r
	51	#define MTRR_LIB_IA32_VARIABLE_MTRR_BASE 0x200\r
3ba736f3 JY	52	//\r
	53	// Below macro is deprecated, and should not be used.\r
	54	//\r
	55	#define MTRR_LIB_IA32_VARIABLE_MTRR_END 0x20F\r
e50466da	56	#define MTRR_LIB_IA32_MTRR_DEF_TYPE 0x2FF\r
	57	#define MTRR_LIB_MSR_VALID_MASK 0xFFFFFFFFFULL\r
	58	#define MTRR_LIB_CACHE_VALID_ADDRESS 0xFFFFFF000ULL\r
	59	#define MTRR_LIB_CACHE_MTRR_ENABLED 0x800\r
	60	#define MTRR_LIB_CACHE_FIXED_MTRR_ENABLED 0x400\r
	61	\r
	62	//\r
	63	// Structure to describe a fixed MTRR\r
	64	//\r
	65	typedef struct {\r
	66	UINT32 Msr;\r
	67	UINT32 BaseAddress;\r
	68	UINT32 Length;\r
	69	} FIXED_MTRR;\r
	70	\r
	71	//\r
	72	// Structure to describe a variable MTRR\r
	73	//\r
	74	typedef struct {\r
	75	UINT64 BaseAddress;\r
	76	UINT64 Length;\r
	77	UINT64 Type;\r
	78	UINT32 Msr;\r
	79	BOOLEAN Valid;\r
	80	BOOLEAN Used;\r
	81	} VARIABLE_MTRR;\r
	82	\r
	83	//\r
	84	// Structure to hold base and mask pair for variable MTRR register\r
	85	//\r
	86	typedef struct _MTRR_VARIABLE_SETTING_ {\r
76b4cae3 MK	87	UINT64 Base;\r
76b4cae3 MK	88	UINT64 Mask;\r
e50466da	89	} MTRR_VARIABLE_SETTING;\r
	90	\r
	91	//\r
	92	// Array for variable MTRRs\r
	93	//\r
	94	typedef struct _MTRR_VARIABLE_SETTINGS_ {\r
341fea64 RN	95	MTRR_VARIABLE_SETTING Mtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];\r
341fea64 RN	96	} MTRR_VARIABLE_SETTINGS;\r
e50466da	97	\r
e50466da	98	//\r
341fea64	99	// Array for fixed MTRRs\r
e50466da	100	//\r
	101	typedef struct _MTRR_FIXED_SETTINGS_ {\r
	102	UINT64 Mtrr[MTRR_NUMBER_OF_FIXED_MTRR];\r
	103	} MTRR_FIXED_SETTINGS;\r
	104	\r
	105	//\r
	106	// Structure to hold all MTRRs\r
	107	//\r
	108	typedef struct _MTRR_SETTINGS_ {\r
	109	MTRR_FIXED_SETTINGS Fixed;\r
	110	MTRR_VARIABLE_SETTINGS Variables;\r
	111	UINT64 MtrrDefType;\r
	112	} MTRR_SETTINGS;\r
	113	\r
	114	//\r
	115	// Memory cache types\r
	116	//\r
	117	typedef enum {\r
76b4cae3 MK	118	CacheUncacheable = 0,\r
	119	CacheWriteCombining = 1,\r
	120	CacheWriteThrough = 4,\r
	121	CacheWriteProtected = 5,\r
78c49925 RN	122	CacheWriteBack = 6,\r
78c49925 RN	123	CacheInvalid = 7\r
e50466da	124	} MTRR_MEMORY_CACHE_TYPE;\r
	125	\r
	126	#define MTRR_CACHE_UNCACHEABLE 0\r
	127	#define MTRR_CACHE_WRITE_COMBINING 1\r
	128	#define MTRR_CACHE_WRITE_THROUGH 4\r
	129	#define MTRR_CACHE_WRITE_PROTECTED 5\r
	130	#define MTRR_CACHE_WRITE_BACK 6\r
	131	#define MTRR_CACHE_INVALID_TYPE 7\r
	132	\r
3b9be416 JY	133	/**\r
	134	Returns the variable MTRR count for the CPU.\r
	135	\r
	136	@return Variable MTRR count\r
	137	\r
	138	**/\r
	139	UINT32\r
ed8dfd7b	140	EFIAPI\r
3b9be416 JY	141	GetVariableMtrrCount (\r
	142	VOID\r
	143	);\r
	144	\r
	145	/**\r
	146	Returns the firmware usable variable MTRR count for the CPU.\r
	147	\r
	148	@return Firmware usable variable MTRR count\r
	149	\r
	150	**/\r
	151	UINT32\r
ed8dfd7b	152	EFIAPI\r
3b9be416 JY	153	GetFirmwareVariableMtrrCount (\r
	154	VOID\r
	155	);\r
	156	\r
e50466da	157	/**\r
	158	This function attempts to set the attributes for a memory range.\r
	159	\r
76b4cae3 MK	160	@param[in] BaseAddress The physical address that is the start\r
	161	address of a memory region.\r
	162	@param[in] Length The size in bytes of the memory region.\r
	163	@param[in] Attribute The bit mask of attributes to set for the\r
	164	memory region.\r
e50466da	165	\r
76b4cae3 MK	166	@retval RETURN_SUCCESS The attributes were set for the memory\r
76b4cae3 MK	167	region.\r
e50466da	168	@retval RETURN_INVALID_PARAMETER Length is zero.\r
76b4cae3 MK	169	@retval RETURN_UNSUPPORTED The processor does not support one or\r
	170	more bytes of the memory resource range\r
	171	specified by BaseAddress and Length.\r
	172	@retval RETURN_UNSUPPORTED The bit mask of attributes is not support\r
	173	for the memory resource range specified\r
	174	by BaseAddress and Length.\r
	175	@retval RETURN_ACCESS_DENIED The attributes for the memory resource\r
	176	range specified by BaseAddress and Length\r
	177	cannot be modified.\r
	178	@retval RETURN_OUT_OF_RESOURCES There are not enough system resources to\r
	179	modify the attributes of the memory\r
	180	resource range.\r
e50466da	181	\r
	182	**/\r
	183	RETURN_STATUS\r
	184	EFIAPI\r
	185	MtrrSetMemoryAttribute (\r
	186	IN PHYSICAL_ADDRESS BaseAddress,\r
	187	IN UINT64 Length,\r
	188	IN MTRR_MEMORY_CACHE_TYPE Attribute\r
	189	);\r
	190	\r
	191	\r
	192	/**\r
	193	This function will get the memory cache type of the specific address.\r
	194	This function is mainly for debugging purposes.\r
	195	\r
76b4cae3	196	@param[in] Address The specific address\r
e50466da	197	\r
	198	@return The memory cache type of the specific address\r
	199	\r
	200	**/\r
	201	MTRR_MEMORY_CACHE_TYPE\r
	202	EFIAPI\r
	203	MtrrGetMemoryAttribute (\r
	204	IN PHYSICAL_ADDRESS Address\r
	205	);\r
	206	\r
	207	\r
	208	/**\r
	209	This function will get the raw value in variable MTRRs\r
	210	\r
76b4cae3	211	@param[out] VariableSettings A buffer to hold variable MTRRs content.\r
e50466da	212	\r
341fea64	213	@return The buffer point to MTRR_VARIABLE_SETTINGS in which holds the content of the variable MTRR\r
e50466da	214	\r
	215	**/\r
	216	MTRR_VARIABLE_SETTINGS*\r
	217	EFIAPI\r
	218	MtrrGetVariableMtrr (\r
	219	OUT MTRR_VARIABLE_SETTINGS *VariableSettings\r
	220	);\r
	221	\r
	222	\r
	223	/**\r
341fea64	224	This function sets variable MTRRs\r
e50466da	225	\r
76b4cae3	226	@param[in] VariableSettings A buffer to hold variable MTRRs content.\r
e50466da	227	\r
	228	@return The pointer of VariableSettings\r
	229	\r
	230	**/\r
	231	MTRR_VARIABLE_SETTINGS*\r
	232	EFIAPI\r
	233	MtrrSetVariableMtrr (\r
	234	IN MTRR_VARIABLE_SETTINGS *VariableSettings\r
	235	);\r
	236	\r
	237	\r
	238	/**\r
	239	This function gets the content in fixed MTRRs\r
	240	\r
76b4cae3	241	@param[out] FixedSettings A buffer to hold fixed MTRRs content.\r
e50466da	242	\r
	243	@return The pointer of FixedSettings\r
	244	\r
	245	**/\r
	246	MTRR_FIXED_SETTINGS*\r
	247	EFIAPI\r
	248	MtrrGetFixedMtrr (\r
	249	OUT MTRR_FIXED_SETTINGS *FixedSettings\r
	250	);\r
	251	\r
	252	\r
	253	/**\r
	254	This function sets fixed MTRRs\r
	255	\r
76b4cae3	256	@param[in] FixedSettings A buffer holding fixed MTRRs content.\r
e50466da	257	\r
	258	@return The pointer of FixedSettings\r
	259	\r
	260	**/\r
	261	MTRR_FIXED_SETTINGS*\r
	262	EFIAPI\r
	263	MtrrSetFixedMtrr (\r
	264	IN MTRR_FIXED_SETTINGS *FixedSettings\r
	265	);\r
	266	\r
	267	\r
	268	/**\r
	269	This function gets the content in all MTRRs (variable and fixed)\r
	270	\r
76b4cae3	271	@param[out] MtrrSetting A buffer to hold all MTRRs content.\r
e50466da	272	\r
	273	@return The pointer of MtrrSetting\r
	274	\r
	275	**/\r
	276	MTRR_SETTINGS *\r
	277	EFIAPI\r
	278	MtrrGetAllMtrrs (\r
	279	OUT MTRR_SETTINGS *MtrrSetting\r
	280	);\r
	281	\r
	282	\r
	283	/**\r
	284	This function sets all MTRRs (variable and fixed)\r
	285	\r
76b4cae3	286	@param[in] MtrrSetting A buffer to hold all MTRRs content.\r
e50466da	287	\r
	288	@return The pointer of MtrrSetting\r
	289	\r
	290	**/\r
	291	MTRR_SETTINGS *\r
	292	EFIAPI\r
	293	MtrrSetAllMtrrs (\r
	294	IN MTRR_SETTINGS *MtrrSetting\r
	295	);\r
	296	\r
	297	\r
	298	/**\r
	299	Get the attribute of variable MTRRs.\r
	300	\r
	301	This function shadows the content of variable MTRRs into\r
	302	an internal array: VariableMtrr\r
	303	\r
76b4cae3 MK	304	@param[in] MtrrValidBitsMask The mask for the valid bit of the MTRR\r
	305	@param[in] MtrrValidAddressMask The valid address mask for MTRR since the base address in\r
	306	MTRR must align to 4K, so valid address mask equal to\r
	307	MtrrValidBitsMask & 0xfffffffffffff000ULL\r
	308	@param[out] VariableMtrr The array to shadow variable MTRRs content\r
	309	\r
438f1766	310	@return The return value of this parameter indicates the number of\r
3ba736f3	311	MTRRs which has been used.\r
e50466da	312	**/\r
3ba736f3	313	UINT32\r
e50466da	314	EFIAPI\r
	315	MtrrGetMemoryAttributeInVariableMtrr (\r
	316	IN UINT64 MtrrValidBitsMask,\r
	317	IN UINT64 MtrrValidAddressMask,\r
	318	OUT VARIABLE_MTRR *VariableMtrr\r
	319	);\r
	320	\r
	321	\r
	322	/**\r
	323	This function prints all MTRRs for debugging.\r
	324	**/\r
	325	VOID\r
ed8dfd7b	326	EFIAPI\r
e50466da	327	MtrrDebugPrintAllMtrrs (\r
430fbbe0	328	VOID\r
e50466da	329	);\r
e50466da	330	\r
947a573a	331	/**\r
	332	Checks if MTRR is supported.\r
	333	\r
	334	@retval TRUE MTRR is supported.\r
	335	@retval FALSE MTRR is not supported.\r
	336	\r
	337	**/\r
	338	BOOLEAN\r
ed8dfd7b	339	EFIAPI\r
947a573a	340	IsMtrrSupported (\r
	341	VOID\r
	342	);\r
	343	\r
91ec7824	344	/**\r
	345	Returns the default MTRR cache type for the system.\r
	346	\r
	347	@return The default MTRR cache type.\r
	348	\r
	349	**/\r
	350	MTRR_MEMORY_CACHE_TYPE\r
	351	EFIAPI\r
	352	MtrrGetDefaultMemoryType (\r
	353	VOID\r
	354	);\r
	355	\r
b970ed68 MK	356	/**\r
	357	This function attempts to set the attributes into MTRR setting buffer for a memory range.\r
	358	\r
	359	@param[in, out] MtrrSetting MTRR setting buffer to be set.\r
	360	@param[in] BaseAddress The physical address that is the start address\r
	361	of a memory region.\r
	362	@param[in] Length The size in bytes of the memory region.\r
	363	@param[in] Attribute The bit mask of attributes to set for the\r
	364	memory region.\r
	365	\r
	366	@retval RETURN_SUCCESS The attributes were set for the memory region.\r
	367	@retval RETURN_INVALID_PARAMETER Length is zero.\r
	368	@retval RETURN_UNSUPPORTED The processor does not support one or more bytes of the\r
	369	memory resource range specified by BaseAddress and Length.\r
	370	@retval RETURN_UNSUPPORTED The bit mask of attributes is not support for the memory resource\r
	371	range specified by BaseAddress and Length.\r
	372	@retval RETURN_ACCESS_DENIED The attributes for the memory resource range specified by\r
	373	BaseAddress and Length cannot be modified.\r
	374	@retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
	375	the memory resource range.\r
	376	\r
	377	**/\r
	378	RETURN_STATUS\r
	379	EFIAPI\r
	380	MtrrSetMemoryAttributeInMtrrSettings (\r
	381	IN OUT MTRR_SETTINGS *MtrrSetting,\r
	382	IN PHYSICAL_ADDRESS BaseAddress,\r
	383	IN UINT64 Length,\r
	384	IN MTRR_MEMORY_CACHE_TYPE Attribute\r
	385	);\r
	386	\r
e50466da	387	#endif // _MTRR_LIB_H_\r